open find issue and hit search
java.lang.AssertionError
at
org.netbeans.modules.bugtracking.util.BugtrackingOwnerSupport.setLooseAssociation(BugtrackingOwnerSupport.java:319)
at org.netbeans.modules.bugtracking.ui.query.QueryTopComponent.started(QueryTopComponent.java:466)
at org.netbeans.modules.bugtracking.spi.Query.fireStarted(Query.java:293)
at org.netbeans.modules.bugtracking.spi.Query.executeQuery(Query.java:305)
at org.netbeans.modules.bugzilla.query.BugzillaQuery.refresh(BugzillaQuery.java:141)
at org.netbeans.modules.bugzilla.query.BugzillaQuery.refresh(BugzillaQuery.java:195)
at org.netbeans.modules.bugzilla.query.QueryController.refresh(QueryController.java:682)
at org.netbeans.modules.bugzilla.query.QueryController$8.run(QueryController.java:652)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)

Fixed.
It was caused by two missing "break;" statements in a switch-statement, causing fallback to the default case, which only
calls "assert false".
Changeset:
#8a8631d996b4
(http://hg.netbeans.org/main/8a8631d996b4).